Maximum rafter spans for a patio roof.
Roof header span table.
In the example the beam spans the 10 foot width of the roof.
These charts are for 30 pound per square foot snow load on the roof.
Window door garage door headers supporting roof loads only.
View joist rafter tables.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
Table number grade live or ground snow load psf dead load psf load duration factor c d.
Includes span tables for all load bearing locations and the number of jack studs.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
Roof ceiling and one clear span floor 4 2x12 9 11 2 8 7 2 7 8 2 fccip 425 main st ste 25 greenfield ma 01301 3393 fccip staff phone.
Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope.
Rim board header size material and span shall be in accordance with table r602 7 1 rim board headers shall be constructed in accordance with figure r602 7 2 and shall be supported at each end by full height studs.
F stands for the beam s fiber strength in bending which depends on the species of wood.
An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry.
The number of full height studs at each end shall be not less than the number of studs displaced by half of the header span based on the maximum stud spacing in accordance with.
For heavy roofs or in.
Fill in the parts of the formula that are already known.
For the initial calculation f can be estimated at 1 000.
Select the span carried by the header across the top of the table.
Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size.
The column on the left of each chart labeled beam span represents the beam length with bearing required for your project.
All other data is available on page 121 of the 2012 international residential code.
Girder spans and header spans for exterior bearing walls maximum spans for douglas fir larch hem fir southern pine and spruce pine fir and required number of jack studs.
Click on the appropriate beam this will take you to the calculation table for your project.
Using the simple span floor joists table with 30 0 span carried select 3 1 2 x 5 1 2.
The total load is 4 000 pounds.
L stands for the span of the beam in feet.
A header with a 4 6 rough opening carries 15 0 simple span joists on each side.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
